The butterfly is belong to complete abnormal kind, its life insects have four evident different development stages：（1）Egg stage (embryonic period）；（2）Larva stage (growth period）；（3）Hebei (the transition）；（4）Adult period (sexual period).

After three development stages jointly called "embryo later development.These four development stage performance, the posture, from morphological perspective, they have nothing in common.

Therefore, must pass through the system research or uninterrupted observation, can understand their original is a species of four development stage.